Term
|
Definition
| Porifera; larger opening located at the top of sponges through which water that has collected in the spongocoel is pushed out |
|
|
Term
|
Definition
| pores on the body surface of sponges through which water enters |
|
|
Term
|
Definition
| tiny pores scattered along the folds of the incurrent canals of sponges |
|
|
Term
|
Definition
| opening through which water passes out of the radial canals into the spongocoel in sponges |
|
|
Term
|
Definition
| flagellated chambers into which water is channeled from the prosopyles in the sponge; portions of the echinderm water vascular system emanating from the ring canal |
|
|
Term
|
Definition
| small openings in the body surface of sponges through which water carrying oxygen and nutrients enters the sponge body |
|
|
Term
|
Definition
| flattened cells making up the outer layer of the sponge body |
|
|
Term
|
Definition
| specialized cells lining the interior surface of the radial canals in sponges that trap and engulf small food particles |
|
|
Term
|
Definition
| elongated, doughnut-shaped cells distributed on the outer body surface of the sponge containing pores that allow water to enter the sponge |
|
|
Term
|
Definition
| mobile cells specialized for distributing food throughout the sponge and for producing its skeleton |
|
|
Term
|
Definition
| large, central cavity that passes through the center of sponges |
|
|
Term
|
Definition
| hard, crystalline calcium carbonate or silicon structures that form the skeleton in many sponges; spiny projections found on the tail of male nematodes that are used during copulation |
|
|
Term
|
Definition
| proteinaceous, flexible material secreted by some sponges to form the skeleton |
|
|
Term
|
Definition
| feeding polyp in some colonial cnidarians |
|
|
Term
|
Definition
| animal whose body develops from only two embryonic tissue layers |
|
|
Term
|
Definition
| outermost of the three primary embryonic germ layers that gives rise to the outer covering of animals and, in some phyla, the nervous system |
|
|
Term
|
Definition
| outer tissue covering in animals, derived from ectoderm |
|
|
Term
|
Definition
| the innermost of the three primary embryonic germ layers that gives rise to many major internal organs and linings |
|
|
Term
|
Definition
| inner tissue layering of the digestive system in many animals; derived from endoderm |
|
|
Term
|
Definition
| acellular, gelatinous substance that fills the space between the outer and inner tissue layers of cnidarians; responsible for the "jelly-like" feel of these organisms |
|
|
Term
|
Definition
| aka coelenteron and coenosarc; central digestive compartment in some invertebrates; characterized by a single opening that functions as both mouth and anus |
|
|
Term
|
Definition
| support system found in certain invertebrates in which contracting muscles push against a fluid-filled body cavity to generate body rigidity |
|
|
Term
|
Definition
| stage in the cnidarian life cycle represented by a cylindrical organism that remains attached to the substrate by a short stalk |
|
|
Term
|
Definition
| stage in the cnidarian life cycle represented by a circular, free-swimming form resembling the familiar jellyfish in its morphology |
|
|
Term
|
Definition
| swimming, juvenile hydrozoan stage that settles to the bottom of the ocean floor where it develops into a new polyp |
|
|
Term
|
Definition
| long, extensible, prehensile arms found in cnidarians and some molluscs that aid in defense, prey capture, and locomotion |
|
|
Term
|
Definition
| enlarged mound of tissue that surrounds the mouth in cnidarians |
|
|
Term
|
Definition
| stinging cells on cnidarian tentacles used for defense and for capturing food |
|
|
Term
|
Definition
| stinging structure located within the cnidocyte in the epidermal layer of cnidarians that is discharged from the cell for defense or prey capture |
|
|
Term
|
Definition
| referring to an organism that contains both male and female reproductive structures |
|
|
Term
|
Definition
| referring to an organism that contains only male or female reproductive structures |
|
|
Term
|
Definition
| short, cellular appendages specialized for locomotion; found in many protists |
|
|
